What I want to do:
As shown in attachment, what I want to do is solder the 4 cables from my first "single strip" circuit board onto the "dual strip" circuit board to give me the ability to run 3 separate strips controlled by the same remote control and powered by the same AC/DC adapter.

My concerns / questions with the below setup:
- is there a risk of over heat and damage?
- is there a risk of voltage drop on the 3 led strips (1x 40 cm, 1x 30 cm, 1x 110 cm)?